Question

Use the figure to write the expression in algebraic form given y = arccos x,  where 0 < y < π/2.

tan y

Answer 1

Step 1 :

Find the trigonometric expression .

From the given data .

If , then .

From the figure : .

Pythagorean theorem : .

The trigonometric function : .

.

Solution :

The algebraic form of the expression is .